Sampling for Water Analysis

Sampling for Water Analysis

Water we use for drinking and use must be checked and approved according to certain standards. In order to determine the cleanliness of the water and its suitability for use or drinking, it must pass various tests, analyzes and controls. It is as important as the test and analysis methods on water samples, that the sample is taken correctly. Within the scope of the Circular on the Control and Sampling Procedures of Drinking and Potable Waters, sampling and analysis processes should be carried out at regular intervals in order to minimize the errors.

Drinking and utility waters are as follows,

• City mains water
• Well water
• Artesian water
• Water in glass or PVC containers
• Carboy water

Steps of Taking Water Sampling from Fountains for Analysis:

1. The mouth of the closed fountain is wiped with a clean cloth.
2. Then the fountain is opened and it is expected to flow vigorously for 3-5 minutes.
3. The fountain is closed again and alcohol cotton is burned and kept in the mouth of the fountain for 10-15 seconds.
4. The fountain opens to flow strongly.
5. The fountain is adjusted to flow slightly.
6. The water sample is taken by holding the sample bottle at a slight angle to the flowing water.
7. Sample bottle is not filled completely, 1-2 finger space is left from the top.
8. The sterile cap or plastic stopper of the bottle is closed.

Steps of Taking Water Sampling from Wells and Similar Places for Analysis:

1. Hands are disinfected with a disinfectant such as alcohol.
2. Sterilized thread is used around the bottle.
3. Long enough rope is added to the bottle and the rope to reach the water.
4. After opening the bottle, it is passed through the flame. Sterile sections are suspended in the well so that they do not touch the surface of the well and the hands of the sampler.
5. The bottle is suspended approximately 75 cm below the water surface.
6. After the water sample is taken, the bottle is lifted up without touching the surfaces again.

After sampling, the following information should be placed on the sample bottle:

• Name of water sample
• Where the water is taken from
• Date and time
• Dose of disinfectant used in water (residual chlorine amount)
• Type of water sampled (well, spring, network, etc.)
• Desired examination (Chemical-Bacteriological)
• Sampling institution
• Number of the article to be sent to the laboratory with the sample